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<A href="introduction6.htm">Debugging Tools for Windows (WinDbg, KD, CDB, NTSD)</A> &gt; <A href="debugger_reference.htm">Debugger Reference</A> &gt; <A href="debugger_commands.htm">Debugger Commands</A> &gt; <A href="general_extensions.htm">General Extension Commands</A> &gt; </div>
	<div id="winchm_template_title">!tp</div>
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	<div id="winchm_template_content"><div id="mainSection"><p>The <b>!tp</b> extension displays thread pool information.</p>
<pre class="syntax"><b>!tp pool </b><i>Address</i><b> </b>[<i>Flags</i>] 
<b>!tp tqueue </b><i>Address</i><b> </b>[<i>Flags</i>] 
<b>!tp </b><i>ItemType Address</i><b> </b>[<i>Flags</i>] 
<b>!tp </b><i>ThreadType</i><b> </b>[<i>Address</i>] 
<b>!tp stats </b><i>Address</i><b> </b>[<i>Flags</i>] 
<b>!tp wfac </b><i>Address</i> 
<b>!tp wqueue </b><i>Address</i><b> </b><i>Priority Node</i> 
<b>!tp -?</b></pre>
<h2><a id="Parameters"></a><a id="parameters"></a><a id="PARAMETERS"></a>Parameters</h2>
<p></p>
<dl>
<dt><a id="_______pool_Address_____________"></a><a id="_______pool_address_____________"></a><a id="_______POOL_ADDRESS_____________"></a>       <b>pool</b><b> </b><i>Address</i>             </dt>
<dd>
<p>Causes the entire thread pool at <i>Address</i> to be displayed.  If <i>Address</i> is 0, then all thread pools will be displayed. </p>
</dd>
<dt><a id="_______tqueue_______Address______"></a><a id="_______tqueue_______address______"></a><a id="_______TQUEUE_______ADDRESS______"></a>       <b>tqueue</b><b>       </b><i>Address</i>      </dt>
<dd>
<p>Causes the active timer queue at <i>Address</i> to be displayed. </p>
</dd>
<dt><a id="_______ItemType_Address______"></a><a id="_______itemtype_address______"></a><a id="_______ITEMTYPE_ADDRESS______"></a>       <i>ItemType Address</i>      </dt>
<dd>
<p>Causes the specified thread pool item to be displayed.  <i>Address</i> specifies the address of the item.  <i>ItemType</i> specifies the type of the item; this can include any of the following possibilities:</p>
<p></p>
<dl>
<dt><a id="obj"></a><a id="OBJ"></a><b>obj</b></dt>
<dd>
<p>A generic pool item (such as an IO item) will be displayed.</p>
</dd>
<dt><a id="timer"></a><a id="TIMER"></a><b>timer</b></dt>
<dd>
<p>A timer item will be displayed.</p>
</dd>
<dt><a id="wait"></a><a id="WAIT"></a><b>wait</b></dt>
<dd>
<p>A wait item will be displayed.</p>
</dd>
<dt><a id="work"></a><a id="WORK"></a><b>work</b></dt>
<dd>
<p>A work item will be displayed.</p>
</dd>
</dl>
</dd>
<dt><a id="_______ThreadType__Address_"></a><a id="_______threadtype__address_"></a><a id="_______THREADTYPE__ADDRESS_"></a>       <i>ThreadType</i> [<i>Address</i>]</dt>
<dd>
<p>Causes threads of the specified type to be displayed.  If <i>Address</i> is included and nonzero, then only the thread at this address is displayed.  If <i>Address</i> is 0, all threads matching <i>ThreadType</i> are displayed.  If <i>Address</i> is omitted, only the threads matching <i>ThreadType</i> associated with the current thread are displayed.  <i>ThreadType</i> specifies the type of the thread to be displayed; this can include any of the following possibilities:</p>
<p></p>
<dl>
<dt><a id="waiter"></a><a id="WAITER"></a><b>waiter</b></dt>
<dd>
<p>A thread pool waiter thread will be displayed. </p>
</dd>
<dt><a id="worker"></a><a id="WORKER"></a><b>worker</b></dt>
<dd>
<p>A thread pool worker thread will be displayed. </p>
</dd>
</dl>
</dd>
<dt><a id="stats__Address_"></a><a id="stats__address_"></a><a id="STATS__ADDRESS_"></a><b>stats</b><b> [</b><i>Address</i><b>]</b></dt>
<dd>
<p>Causes the debug statistics of the current thread to be displayed.  <i>Address</i> may be omitted, but if it is specified, it must equal -1 (negative one), to represent the current thread. </p>
</dd>
<dt><a id="_______wfac_______Address______"></a><a id="_______wfac_______address______"></a><a id="_______WFAC_______ADDRESS______"></a>       <b>wfac</b><b>       </b><i>Address</i>      </dt>
<dd>
<p>
       (Windows 7 and later only)  Causes the worker factory at <i>Address</i> to be displayed.  The specified <i>Address</i> must be a valid nonzero address. </p>
</dd>
<dt><a id="_______wqueue_______Address______"></a><a id="_______wqueue_______address______"></a><a id="_______WQUEUE_______ADDRESS______"></a>       <b>wqueue</b><b>       </b><i>Address</i>      </dt>
<dd>
<p>
       (Windows 7 and later only)  Causes display of a work queue and NUMA node that matche the following: a specified priority, a specified NUMA node, and the pool, at a specified address, to which the NUMA node belongs.  <i>Address</i> specifies the address of the pool. When the <b>wqueue</b> parameter is used, it must be followed by <i>Address</i>, <i>Priority</i>, and <i>Node</i>. </p>
</dd>
<dt><a id="_______Priority______"></a><a id="_______priority______"></a><a id="_______PRIORITY______"></a>       <i>Priority</i>      </dt>
<dd>
<p>
       (Windows 7 and later only)  Specifies the priority levels of the work queues to be displayed. <i>Priority</i> can be any of the following values: </p>
<p></p>
<dl>
<dt><a id="0"></a><b>0</b></dt>
<dd>
<p>Work queues with high priority are displayed. </p>
</dd>
</dl>
<p></p>
<dl>
<dt><a id="1"></a><b>1</b></dt>
<dd>
<p>Work queues with normal priority are displayed. </p>
</dd>
</dl>
<p></p>
<dl>
<dt><a id="2"></a><b>2</b></dt>
<dd>
<p>Work queues with low priority are displayed. </p>
</dd>
</dl>
<p></p>
<dl>
<dt><a id="-1"></a><b>-1</b></dt>
<dd>
<p>All work queues are displayed.  </p>
</dd>
</dl>
</dd>
<dt><a id="_______Node______"></a><a id="_______node______"></a><a id="_______NODE______"></a>       <i>Node</i>      </dt>
<dd>
<p>
       (Windows 7 and later only)  Specifies a NUMA node belonging to the pool specified by <i>Address</i>. If <i>Node</i> is -1 (negative one), all NUMA nodes are displayed. </p>
</dd>
<dt><a id="_______Flags______"></a><a id="_______flags______"></a><a id="_______FLAGS______"></a>       <i>Flags</i>      </dt>
<dd>
<p>Specifies what the display should contain. This can be a sum of any of the following bit values (the default is 0x0):</p>
<p></p>
<dl>
<dt><a id="Bit_0__0x1_"></a><a id="bit_0__0x1_"></a><a id="BIT_0__0X1_"></a>Bit 0 (0x1)</dt>
<dd>
<p>Causes the display to be single-line output.  This bit value has no effect on the output when an <i>ItemType</i> is displayed.</p>
</dd>
<dt><a id="Bit_1__0x2_"></a><a id="bit_1__0x2_"></a><a id="BIT_1__0X2_"></a>Bit 1 (0x2)</dt>
<dd>
<p>Causes the display to include member information.</p>
</dd>
<dt><a id="Bit_2__0x4_"></a><a id="bit_2__0x4_"></a><a id="BIT_2__0X4_"></a>Bit 2 (0x4)</dt>
<dd>
<p>This flag is relevant only when the <b>pool</b> option is used.  In Windows XP, Windows Server 2003, Windows Vista, and Windows Server 2008, this flag causes the display to include the pool work queue.  In Windows 7 and later, this flag causes the display to include all the pool's work queues that are at normal priority, and all NUMA nodes. </p>
</dd>
</dl>
</dd>
<dt><a id="_______-_______"></a>       <b>-?</b>      </dt>
<dd>
<p>Displays a brief help text for this extension in the Debugger Command window.</p>
</dd>
</dl>
<h3><a id="DLL"></a><a id="dll"></a>DLL</h3>
<table>
<tr>
<td>
<p><b>Windows 2000</b></p>
</td>
<td>
<p>Unavailable</p>
</td>
</tr>
<tr>
<td>
<p><b>Windows XP and later
         </b></p>
</td>
<td>
<p>
          Exts.dll
         </p>
</td>
</tr>
</table>
<p> </p>
<h3><a id="Additional_Information"></a><a id="additional_information"></a><a id="ADDITIONAL_INFORMATION"></a>Additional Information</h3>
<p>For information about thread pooling, see the Microsoft Windows SDK documentation.</p></div></div>	
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